/*
 * Copyright 2002-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Runtime.Serialization;
using Spring.Util;

namespace Spring.Expressions;

/// <summary>
/// </summary>
/// <author>Erich Eichinger</author>
[Serializable]
public class OpXOR : BinaryOperator
{
    /// <summary>
    /// Create a new instance
    /// </summary>
    public OpXOR()
    {
    }

    /// <summary>
    /// Create a new instance
    /// </summary>
    public OpXOR(BaseNode left, BaseNode right)
        : base(left, right)
    {
    }

    /// <summary>
    /// Create a new instance from SerializationInfo
    /// </summary>
    protected OpXOR(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {
    }

    /// <summary>
    /// Returns a value for the logical AND operator node.
    /// </summary>
    /// <param name="context">Context to evaluate expressions against.</param>
    /// <param name="evalContext">Current expression evaluation context.</param>
    /// <returns>Node's value.</returns>
    protected override object Get(object context, EvaluationContext evalContext)
    {
        object l = GetLeftValue(context, evalContext);
        object r = GetRightValue(context, evalContext);

        if (NumberUtils.IsInteger(l) && NumberUtils.IsInteger(r))
        {
            return NumberUtils.BitwiseXor(l, r);
        }
        else if (l is Enum && l.GetType() == r.GetType())
        {
            Type enumType = l.GetType();
            Type integralType = Enum.GetUnderlyingType(enumType);
            l = Convert.ChangeType(l, integralType);
            r = Convert.ChangeType(r, integralType);
            object result = NumberUtils.BitwiseXor(l, r);
            return Enum.ToObject(enumType, result);
        }

        return Convert.ToBoolean(l) ^ Convert.ToBoolean(r);
    }
}
